arm: dts: ls2080aqds: add CONFIG_MULTI_DTB_FIT support

Add support for selecting the appropriate DTS file depending on the
SERDES protocol used.

The fsl-ls2080a-qds DTS will be used by default if there isn't a DTS
file specifically made for the current SERDES protocol.

This patch adds the necessary DPMAC nodes (DPMAC 1-8) for
protocol 42 (0x2A) on SD#1.

Also, in case CONFIG_DM_ETH and CONFIG_MULTI_DTB_FIT are enabled
implement the board_fit_config_name_match() function in order to choose
the appropriate DTS.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/board/freescale/ls2080aqds/eth.c b/board/freescale/ls2080aqds/eth.c
index 2b1b106b07..0d6eec377f 100644
--- a/board/freescale/ls2080aqds/eth.c
+++ b/board/freescale/ls2080aqds/eth.c
@@ -989,3 +989,100 @@ void reset_phy(void)
 	mc_env_boot();
 }
 #endif /* CONFIG_RESET_PHY_R */
+
+#if defined(CONFIG_DM_ETH) && defined(CONFIG_MULTI_DTB_FIT)
+
+/* Structure to hold SERDES protocols supported in case of
+ * CONFIG_DM_ETH enabled (network interfaces are described in the DTS).
+ *
+ * @serdes_block: the index of the SERDES block
+ * @serdes_protocol: the decimal value of the protocol supported
+ * @dts_needed: DTS notes describing the current configuration are needed
+ *
+ * When dts_needed is true, the board_fit_config_name_match() function
+ * will try to exactly match the current configuration of the block with a DTS
+ * name provided.
+ */
+static struct serdes_configuration {
+	u8 serdes_block;
+	u32 serdes_protocol;
+	bool dts_needed;
+} supported_protocols[] = {
+	/* Serdes block #1 */
+	{1, 42, true},
+
+	/* Serdes block #2 */
+	{2, 65, false},
+};
+
+#define SUPPORTED_SERDES_PROTOCOLS ARRAY_SIZE(supported_protocols)
+
+static bool protocol_supported(u8 serdes_block, u32 protocol)
+{
+	struct serdes_configuration serdes_conf;
+	int i;
+
+	for (i = 0; i < SUPPORTED_SERDES_PROTOCOLS; i++) {
+		serdes_conf = supported_protocols[i];
+		if (serdes_conf.serdes_block == serdes_block &&
+		    serdes_conf.serdes_protocol == protocol)
+			return true;
+	}
+
+	return false;
+}
+
+static void get_str_protocol(u8 serdes_block, u32 protocol, char *str)
+{
+	struct serdes_configuration serdes_conf;
+	int i;
+
+	for (i = 0; i < SUPPORTED_SERDES_PROTOCOLS; i++) {
+		serdes_conf = supported_protocols[i];
+		if (serdes_conf.serdes_block == serdes_block &&
+		    serdes_conf.serdes_protocol == protocol) {
+			if (serdes_conf.dts_needed == true)
+				sprintf(str, "%u", protocol);
+			else
+				sprintf(str, "x");
+			return;
+		}
+	}
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	struct ccsr_gur *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
+	u32 rcw_status = in_le32(&gur->rcwsr[28]);
+	char srds_s1_str[2], srds_s2_str[2];
+	u32 srds_s1, srds_s2;
+	char expected_dts[100];
+
+	srds_s1 = rcw_status & FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_MASK;
+	srds_s1 >>= FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_SHIFT;
+
+	srds_s2 = rcw_status & FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_MASK;
+	srds_s2 >>= FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_SHIFT;
+
+	/* Check for supported protocols. The default DTS will be used
+	 * in this case
+	 */
+	if (!protocol_supported(1, srds_s1) ||
+	    !protocol_supported(2, srds_s2))
+		return -1;
+
+	get_str_protocol(1, srds_s1, srds_s1_str);
+	get_str_protocol(2, srds_s2, srds_s2_str);
+
+	printf("expected_dts %s\n", expected_dts);
+	sprintf(expected_dts, "fsl-ls2080a-qds-%s-%s",
+		srds_s1_str, srds_s2_str);
+
+	if (!strcmp(name, expected_dts))
+		return 0;
+
+	printf("this is not!\n");
+	return -1;
+}
+
+#endif